U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY- BULLETIN NO. 86. 



B. T. GALLOWAY, ChkJ of Bureau. 



AGRICULTURE WITHOUT IRRIGATION IN THE 



SAHARA DESERT. 



BY 



THOMAS H. KEARNEY, 

 Physiologist. 



VEGETABLE PATHOLOGICAL AND PHYSIOLOGICAL 

 INVESTIGATIONS. 



Issued November 16, 1905. 



LIBRARY 

 NEW YORK 

 BOTANICAL 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1905. 



